2153544409 has 2 divisors, whose sum is σ = 2153544410. Its totient is φ = 2153544408.

The previous prime is 2153544403. The next prime is 2153544451. The reversal of 2153544409 is 9044453512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1310222809 + 843321600 = 36197^2 + 29040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153544409 - 2³ = 2153544401 is a prime.

It is not a weakly prime, because it can be changed into another prime (2153544401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076772204 + 1076772205.

It is an arithmetic number, because the mean of its divisors is an integer number (1076772205).

Almost surely, 2^2153544409 is an apocalyptic number.

It is an amenable number.

2153544409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153544409 is an equidigital number, since it uses as much as digits as its factorization.

2153544409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2153544409 is about 46406.2970834778. The cubic root of 2153544409 is about 1291.3717373518.

The spelling of 2153544409 in words is "two billion, one hundred fifty-three million, five hundred forty-four thousand, four hundred nine".